To fix this error:
# nslookup mydomain.com
nslookup: error while loading shared libraries: liblwres.so.50: cannot open shared object file: No such file or directory
Do this:
# ldconfig
# dig mydomain.com
; <<>> DiG 9.6.1-RedHat-9.6.1-2.fc11 <<>> mydomain.com
...
From the ldconfig manpage:
ldconfig creates the necessary links and cache to the most recent shared libraries found in the directories specified on the command line, in the file /etc/ld.so.conf, and in the trusted directories (/lib and /usr/lib). The cache is used by the run-time linker, ld.so or ld-linux.so. ldconfig checks the header and filenames of the libraries it encounters when determining which versions should have their links updated.
